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Patent applications and USPTO patent grants for Pietsch; Stephen J..The latest application filed is for "purification of fluid compounds utilizing a distillation - membrane separation process".
Patent | Date |
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Purification of fluid compounds utilizing a distillation - membrane separation process Grant 7,070,694 - Colling , et al. July 4, 2 | 2006-07-04 |
Purification of fluid compounds utilizing a distillation - membrane separation process App 20040182786 - Colling, Craig W. ;   et al. | 2004-09-23 |
Method for purifying a crude naphthalene dicarboxylic acid Grant 4,933,491 - Albertins , et al. June 12, 1 | 1990-06-12 |
Continuous process for production of methacrylic acid ester of C.sub.1 to C.sub.4 aliphatic alcohol Grant 4,748,268 - Pietsch , et al. May 31, 1 | 1988-05-31 |
Separation of cobalt and manganese from trimellitic acid process residue by extraction, ion exchanger and magnet Grant 4,298,759 - Harper , et al. November 3, 1 | 1981-11-03 |
Separation of cobalt and manganese from trimellitic acid process residue by precipitating as carbonates, redissolving as halides and removing cobalt by magnetic means Grant 4,298,580 - Harper , et al. November 3, 1 | 1981-11-03 |
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